setInterval( "getMessage()" ,1000);
function  getMessage() {
    $.ajax({
        type:  "POST" ,
        url:  "/message/getunreadnum" ,
        timeout: 60000,
        async: true,
        success:  function (data) {
            if(data.status)
                $( "#unreadnum" ).html(data.message);
        }
    });
}